US5816754A - Elongated drill with replaceable cutting inserts - Google Patents

Elongated drill with replaceable cutting inserts Download PDF

Info

Publication number
US5816754A
US5816754A US08/746,033 US74603396A US5816754A US 5816754 A US5816754 A US 5816754A US 74603396 A US74603396 A US 74603396A US 5816754 A US5816754 A US 5816754A
Authority
US
United States
Prior art keywords
drill
inserts
insert
corner
cutting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/746,033
Other languages
English (en)
Inventor
Fred T. Shallenberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GREENFIELD INDUSTRIES
Greenfield Industries Inc
Original Assignee
Greenfield Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Greenfield Industries Inc filed Critical Greenfield Industries Inc
Priority to US08/746,033 priority Critical patent/US5816754A/en
Assigned to GREENFIELD INDUSTRIES reassignment GREENFIELD INDUSTRIES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHALLENBERGER, FRED T.
Priority to CA002213544A priority patent/CA2213544C/fr
Priority to EP97203103A priority patent/EP0841115A1/fr
Priority to IL12193597A priority patent/IL121935A/xx
Priority to CN97122562A priority patent/CN1069248C/zh
Priority to KR1019970057461A priority patent/KR100243848B1/ko
Priority to JP9304408A priority patent/JPH10296514A/ja
Publication of US5816754A publication Critical patent/US5816754A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S408/00—Cutting by use of rotating axially moving tool
    • Y10S408/705—Drilling deep holes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S408/00—Cutting by use of rotating axially moving tool
    • Y10S408/713—Tool having detachable cutting edge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel

Definitions

  • This invention generally relates to drills for forming holes in metal workpieces, and more particularly relates to drills having replaceable cutting inserts.
  • Metal boring tools and drills commonly employ replaceable cutting inserts which allow the shaft of the drill to be repeatedly used while only replacing, or resharpening, the cutting inserts. This results in a longer lasting drill with less maintenance costs.
  • a drill is disclosed in Shallenberger, Jr. U.S. Pat. No. 3,963,365.
  • one insert is an outer insert which removes metal from the peripheral wall of the hole and inwardly toward the center of the hole in a cutting arc whose width is equal to one-half the radius of the hole.
  • the other insert is an inner insert which removes metal from the center of the hole and outwardly toward the peripheral wall of the hole in a cutting arc of substantially equal width.
  • Negishi, et al U.S. Pat. No. 4,373,839 discloses a drill which may be fed axially at a rate approximately twice that of the Shallenberger, Jr. drill. This is because the two cutting blades of the Negishi drill are positioned so as to cut the entire circumference of the hole during each one-half revolution of the drill.
  • Shallenberger U.S. Pat. No. 5,092,718 provides a drill with two replaceable cutting inserts which each span virtually one-half of the diameter of the drill. A relatively small portion is left in the center of the workpiece which can be easily removed by fragmentation as the tip end of the drill is advanced axially.
  • the cutting inserts are preferably triangular in shape, although other shapes are possible, and the flutes of the drill bit are provided with pockets to receive the cutting inserts.
  • a relatively wide portion of the drill shank is disposed between the cutting inserts to impart strength to the drill.
  • the primary objective of the present invention is to provide a new and improved drill of the same general type as that disclosed in Shallenberger, U.S. Pat. No. 5,092,718, but having a length which is substantially greater than its diameter to enable the drill to produce relatively deep bores as compared to their diameters.
  • a feature of the present invention is the provision of a drill with precisely balanced cutting inserts such that the radial forces generated by the cutting action are balanced between the inserts, and thus substantially cancel each other.
  • Another feature of the present invention is the provision of cutting inserts which extend from the shank pockets in an identical manner so as to engage the workpiece in an identical manner and thereby place substantially identical loads on each cutting insert.
  • Another feature of the present invention is the provision of a drill having inserts with uniquely curved cutting edges and steeply inclined sides which enables the cutting edges of the cutting inserts to be positioned closely adjacent one another while leaving a strong section of drill shank between the sides of the inserts to impart strength to the drill even at length to diameter ratios greater than three to one.
  • Another feature of the present invention is the provision of a drill with a length to diameter ratio of four to one or more.
  • FIG. 1 is a side elevational view of one embodiment of the present invention.
  • FIG. 1A is an enlarged fragmentary perspective view of the tip end portion of the drill illustrated in FIG. 1 but showing the drill with both of the inserts removed.
  • FIG. 2 is an enlarged fragmentary side elevational view of the drill illustrated in FIG. 1 and shows the drill forming a hole in a workpiece.
  • FIG. 3 is an enlarged end view of the drill.
  • FIG. 4 is a perspective view of one of the triangular inserts.
  • FIG. 5 is a top plan view of the insert.
  • FIG. 6 is a front elevational view of the insert.
  • FIG. 7 is an edge view of the insert as seen from the right of FIG. 6.
  • FIG. 8 is an enlarged schematic view showing the inserts drilling a hole.
  • FIG. 9A is a schematic side view of the present invention with the workpiece bore formed by the drill shown in cross-section.
  • FIG. 9B is a schematic end view of the embodiment shown in FIG. 9A.
  • FIG. 9C is a schematic top view of bore profile created by the embodiment shown in FIG. 9A.
  • FIG. 10A is a schematic side view of a prior art drill with the workpiece bore formed by the drill shown in cross-section.
  • FIG. 10B is a schematic end view of drill shown in FIG. 10A.
  • FIG. 10C is a schematic top view of the bore profile created by the drill shown in FIG. 10A.
  • FIG. 11A is a schematic side view of another prior art drill with the workpiece bore formed by the drill shown in cross-section.
  • FIG. 11B is a schematic end view of the drill shown in FIG. 11A.
  • FIG. 11C is a schematic top view of the bore profile created by the drill shown in FIG. 11A.
  • Drill 10 for forming cylindrical bore 11 (FIGS. 2 and 8) in workpiece 12 made of iron, steel or other metal.
  • Drill 10 includes elongated and generally cylindrical body 13, which is the preferred embodiment is made of high carbon steel, and has tip end 14 and opposite shank end 15. However, other materials having similar physical characteristics are possible.
  • Shank end 15 of body 13 is adapted to be clamped in a power-rotated holder (not shown) for effecting rotation of drill 10 about its own axis A (FIG. 3), the rotation herein being in a counterclockwise direction as viewed in FIGS. 1 and 3. It will be appreciated that drill 10 could be held rotationally stationary and that workpiece 12 could be rotated about axis A of drill 10.
  • Two generally diametrically or equilaterally spaced flutes 16 and 17 are formed in body 13 to carry chips away from the end 14.
  • the flutes preferably extend helically (FIGS. 1 and 2) around and along body 13 from tip end 14 toward shank end 15 to enable metal chips to be carried from bore 11.
  • the flutes can be straight as in FIG. 1.
  • Each flute is generally V-shaped in radial cross-section and is defined by a pair of walls 18 and 19. Wall 18 of each flute faces generally in the direction of rotation while wall 19 faces generally opposite to the direction of rotation.
  • pockets 20 and 21 are formed in body 13 adjacent the tip end portions of flutes 16 and 17, respectively, each pocket being formed near wall 18 of the respective flute.
  • pockets 20 and 21 are generally diametrically spaced apart in the preferred embodiment, it is to be understood that the present invention covers further embodiments wherein the pockets are otherwise equidistantly spaced apart.
  • Replaceable cutting inserts 30 and 31 are seated in pockets 20 and 21, respectively, and act to cut bore 11 in workpiece 12 when drill 10 is rotated counterclockwise about axis A.
  • each cutting insert 30, 31 is generally triangular in shape and is formed with a specially configured corner.
  • triangular inserts enables a full circumference of bore 11 to be cut during each one-half revolution of drill 10 while permitting tip end portion 14 of the drill to be sufficiently strong to withstand heavy cutting forces imposed on inserts 30, 31.
  • alternatively shaped inserts are possible.
  • Insert 30 is shown in detail in FIGS. 4 and 7, it being understood that insert 31 is identical to the insert 30.
  • insert 30 is generally in the shape of an equilateral triangle and includes three sides or edge surfaces 33, 34 and 35 of substantially equal length and joining one another at three corners 36, 37 and 38.
  • the three edge surfaces extend between two oppositely facing and generally planar face surfaces 40 and 41.
  • Each face surface 40, 41 of each insert is formed with a conventional chip-breaking groove 42 (FIGS. 4 and 6) which is located just inwardly of the periphery of the face surface.
  • cutting edge 45 is defined at the junction of face surface 40 and edge surface 34 and, as the cutting edge proceeds from corner 36 toward corner 37, it is straight along most of its length as indicated at 46.
  • cutting edge 45 starts curving convexly and curves convexly out of the plane of the surface 40 and toward the plane of face surface 41 as the cutting edge proceeds around the corner.
  • Curved portion 47 of the cutting edge 45 curves around until meeting plane 41 at point 48. (FIG. 5)
  • edge 49 is formed in plane 41 which is not parallel to edge 35.
  • Formation of curved portion 47 of each cutting edge 45 is effected by appropriately grinding or otherwise forming the portions of face surface 40 and edge surface 35 adjacent corner 37 of insert 30, 31. As a result, the corner portion of face surface 40 and edge surface 35 are convexly curved as indicated at 50 in FIG. 4.
  • Pockets 20 and 21 for inserts 30 and 31, respectively each include a flat platform 55 (FIG. 1A) against which face 41 of each insert 30, 31 is seated.
  • Two side walls 56 and 57 project from each platform and are angled relative to one another so as to cause pocket 20, 21 to be formed with generally V-shaped configurations.
  • edge surfaces 33 and 35 seat against side walls 56 and 57, respectively, and thus corner 38 of each insert points toward shank end 15 of drill body 13.
  • Hole 59 (FIG. 4) is formed through each insert 30, 31 and extends between and perpendicular to face surfaces 40 and 41 of each insert. As best shown in FIG. 5, hole 59 includes countersinks 159 at opposite ends to accommodate the heads of screws 60. To secure inserts 30, 31 in pockets 20, 21, threaded screw or locking pin 60 (FIGS. 2 and 3) extends through each hole 59 and is threaded into tapped hole 61 (FIG. 1A) in platform 55.
  • Platform 55 of each pocket 20, 21 is inclined relative to axis A so as to cause cutting edge 45 of each insert 30, 31 to be disposed at a negative axial rake angle, meaning that leading cutting face 40 of each insert 30, 31 is located ahead of cutting edge 45.
  • the edge surface 34 of each insert 30, 31 is tipped in such a direction as to define a clearance face and to avoid rubbing against the bottom of bore 11 during drilling thereof.
  • the negative axial rake angle is approximately seven degrees.
  • Each insert 30, 31 also is positioned such that its cutting edge 45 is located at a negative radial rake. That is to say, each cutting edge 45 is positioned ahead of the most nearly adjacent radial line that parallels the cutting edge and thus corner 36 of each insert 30, 31 behind cutting edge 45 clears the peripheral wall of bore 11 so as to avoid rubbing against such wall.
  • each cutting edge 45 is positioned approximately more than one half the insert thickness ahead of the aforementioned radial line.
  • Cutting edge 45 of each insert 30, 31 also is inclined at a lead angle C (FIG. 2) of about 8 degrees. As a result of the lead angle, cutting edge 45 slopes toward shank end 15 of body 13 as the edge progresses outwardly toward the peripheral wall of bore 11. This causes the center portion of bore 11 to be cut somewhat prior to cutting of the peripheral portion and facilitates initial penetration of drill 10 into the workpiece 12.
  • inserts 30, 31 are positioned and angled such that corners 37 are spaced very closely together (i.e., a spacing of between 0.15 and 0.5 millimeter) and thus core 70 is very small in diameter. Accordingly, core 70 may be easily snapped off by edge surfaces 35 adjacent the corners, or simply fragmented by tip end 14 of the drill as the drill advances axially. Because inserts 30, 31 are triangular, edge surfaces 35 of inserts 30, 31 quickly diverge away from one another at a wide angle X of approximately 44 degrees as edge surfaces 35 progress from tip end 14 of drill 10 toward shank end 15. Because of the wide divergence of edge surfaces 35, significant space exists therebetween for the metal of drill body 13.
  • body portion 74 between edge surfaces 35 may be comparatively thick and rugged to a point closely adjacent corners 37 so as to impart strength to body 13.
  • edge surfaces 35 converge toward tip end 14 of body 13 allows corners 37 to be located closely adjacent one another so that an easily breakable core 70 of only small diameter is left between the inserts.
  • Each insert 30, 31 preferably is formed with alternately usable cutting edge 45' which is formed along the junction of face surface 41 with edge surface 33.
  • cutting edge 45' is identical to cutting edge 45 and includes straight and curved portions similar to straight and curved portions 46 and 47 of the cutting edge 45.
  • the straight portion of cutting edge 45' starts at corner 36 and extends to a curved portion located at corner 38.
  • the curved portion of cutting edge 45' is defined by forming convexly curved portion 50' (FIG. 7) on face 41 of inserts 30, 31.
  • each insert After cutting edge 45 of each insert 30, 31 has become worn, the insert may be removed from the pocket 20, 21. By both inverting and indexing the insert, cutting edge 45' may be brought into active cutting position. Accordingly, each insert includes two alternately usable cutting edges and thus the insert need not be discarded until both edges have been worn.
  • FIGS. 9A-C schematically illustrate the present invention.
  • a full cut "a" is made across the entire diameter of bore 11 with each one-half revolution of the drill.
  • radial force E acts upon insert 30
  • radial force F acts upon insert 31. Since inserts 30 and 31 are precisely and equally balanced, and diametrically opposed, forces E and F are exactly equal and cancel each other.
  • the drill shown in FIGS. 11A-C includes two inserts which each require a full revolution to cut a full circumferential swath in bore 11".
  • insert 30" includes cutting surface 101 and 102
  • cutting insert 31" includes cutting surface 103 and 104.
  • FIG. 11C it can be seen that cutting surface 101 creates circumferential cut a", while surface 102 makes cut b", surface 103 makes cut c", and surface 104 makes cut d".
  • the length to diameter ratio of the present invention is not limited to approximately three to one as are prior art devices, but can be four to one or more. In fact, tests have been successfully performed at a ratio of ten to one.
  • working length L of the drill is substantially greater than diameter D of tip end 14.
  • length L is depicted as six times diameter D, although the present invention is designed to encompass all length to diameter ratios in excess of four to one. Prior to the present invention, it was believed that such length to diameter ratios were impossible due to the aforementioned radial forces imparted by the cutting surfaces engaging the workpiece, and the resulting deflection.
  • body 13 can therefore have a length L which is greater than four times diameter D.
  • working length L of body 13 can be substantially greater than the diameter of tip end 14.
  • tests have been successfully performed with a L/D ratio of as high as ten to one. This necessarily equates to resulting bore 11 having a substantially longer, relative to a given diameter, profile than was heretofore possible.
  • the present invention brings to the art a new and improved drill 10 with body 13 with length L which is at least four times the diameter D of tip end portion 14. Due to the use of multi-edged indexable inserts 30 and 31 which cut a full circumference of bore 11 across virtually its full diameter during each one-half revolution of the drill, the drill may be fed axially at a rapid rate. Because the inserts are triangular, adjacent corners 37 of the inserts may be positioned very close together, and yet a thick section of drill body 13 may be located between the inserts near the corners 37 so as to impart strength to the drill shank even with such high length to diameter ratios. Most importantly, due to the precise balancing of radial forces E and F acting on inserts 30 and 31, respectively, body 13 is able to maintain length to diameter ratios previously believed to result in unacceptable drill deflection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
US08/746,033 1996-11-06 1996-11-06 Elongated drill with replaceable cutting inserts Expired - Lifetime US5816754A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US08/746,033 US5816754A (en) 1996-11-06 1996-11-06 Elongated drill with replaceable cutting inserts
CA002213544A CA2213544C (fr) 1996-11-06 1997-08-21 Foret allonge muni de plaquettes de coupe remplacables
EP97203103A EP0841115A1 (fr) 1996-11-06 1997-10-06 Foret long avec des plaquettes de coupe
CN97122562A CN1069248C (zh) 1996-11-06 1997-10-09 具有可更换切割刀片的深孔钻
IL12193597A IL121935A (en) 1996-11-06 1997-10-09 Elongated drill with replaceable cutting inserts
KR1019970057461A KR100243848B1 (ko) 1996-11-06 1997-10-31 교체 가능한 절삭 삽입 날을 구비하고 있는 가느다란 드릴
JP9304408A JPH10296514A (ja) 1996-11-06 1997-11-06 交換自在な切削差し込み工具を有する棒状ドリル

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/746,033 US5816754A (en) 1996-11-06 1996-11-06 Elongated drill with replaceable cutting inserts

Publications (1)

Publication Number Publication Date
US5816754A true US5816754A (en) 1998-10-06

Family

ID=24999219

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/746,033 Expired - Lifetime US5816754A (en) 1996-11-06 1996-11-06 Elongated drill with replaceable cutting inserts

Country Status (7)

Country Link
US (1) US5816754A (fr)
EP (1) EP0841115A1 (fr)
JP (1) JPH10296514A (fr)
KR (1) KR100243848B1 (fr)
CN (1) CN1069248C (fr)
CA (1) CA2213544C (fr)
IL (1) IL121935A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6000887A (en) * 1998-05-19 1999-12-14 Ingersoll Cutting Tool Company Stiff drill
US6238151B1 (en) * 1998-09-28 2001-05-29 Mitsubishi Materials Corporation Drilling tool and throw-away tip for use in drilling work
US20030012613A1 (en) * 2001-07-05 2003-01-16 Syoji Takiguchi Throw-away tip for use in drilling work and throw-away drilling tool
US6808340B2 (en) 2002-09-06 2004-10-26 Prototype Productions, Inc. Tool apparatus
US20050163921A1 (en) * 2004-01-23 2005-07-28 The Boeing Company Method of repairing a workpiece
US20060110227A1 (en) * 2002-09-09 2006-05-25 Jacek Kruszynski Drilling tool with alternating cutting plates and alternating cutting plates for said drilling tool
US20080232915A1 (en) * 2004-12-02 2008-09-25 Werner Reinhardt Twist drill for drilling with a countersink cutting arrangement, and a cutting tool with a countersink cutting arrangement, and a cutting-chamfering tool
US20090116913A1 (en) * 2007-11-01 2009-05-07 Gm Global Technology Operations Inc. Polycrystalline Diamond Cutting Tool with Coated Body
US20110033255A1 (en) * 2008-03-25 2011-02-10 Unitac, Inc. Gun Drill
US9579732B2 (en) 2012-07-18 2017-02-28 Milwaukee Electric Tool Corporation Hole saw
US20180318939A1 (en) * 2015-11-26 2018-11-08 Sumitomo Electric Hardmetal Corp. Rotary tool
CN112262009A (zh) * 2018-06-13 2021-01-22 博泰克精密钻孔技术有限公司 切削表面中具有一个或多个凹陷的深孔钻和钻具
US11148212B2 (en) 2018-07-10 2021-10-19 Milwaukee Electric Tool Corporation Hole saw with hex sidewall holes
USD958855S1 (en) 2019-12-09 2022-07-26 Milwaukee Electric Tool Corporation Hole saw

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009241239A (ja) * 2008-03-31 2009-10-22 Fuji Seiko Ltd ドリルおよび穴あけ加工方法
DE102009051073A1 (de) * 2009-10-28 2011-05-12 Kennametal Inc. Mehrfachwechselschneidplatte für ein Bohrwerkzeug
CN102489730B (zh) * 2011-11-25 2013-06-12 天津市瑞德螺杆泵制造技术有限公司 双螺杆泵螺杆螺旋型面数控加工刀具
CN103506666B (zh) * 2012-06-20 2017-10-03 博世电动工具（中国）有限公司 用于钻头的刀片
CN104907614A (zh) * 2015-05-26 2015-09-16 苏州阿诺精密切削技术股份有限公司 V形定位双螺钉锁紧齿冠钻杆
CN104827094A (zh) * 2015-05-26 2015-08-12 苏州阿诺精密切削技术股份有限公司 V形定位双螺钉锁紧齿冠钻头
CN109623008A (zh) * 2018-12-12 2019-04-16 中色科技股份有限公司 一种深孔端面的加工装置及方法
DE102019100891A1 (de) * 2019-01-15 2020-07-16 Botek Präzisionsbohrtechnik Gmbh Bohrkopf zum Auskesseln von nicht-zylindrischen Innenkonturen

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1477244A1 (de) * 1964-10-20 1969-09-04 Dearborn Howard Kenneth Bohrwerkzeug
US3963365A (en) * 1975-05-07 1976-06-15 Metal Cutting Tools, Inc. Drill with indexable inserts
SU521074A1 (ru) * 1974-07-17 1976-07-15 Предприятие П/Я В-8772 Спиральное сверло
US4373839A (en) * 1979-10-02 1983-02-15 Mitsubishi Kinzoku Kabushiki Kaisha Drill bit
US4813823A (en) * 1986-01-18 1989-03-21 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Drilling tool formed of a core-and-casing assembly
US5035552A (en) * 1988-09-29 1991-07-30 Lysenko Viktor G Twist drill for deep hole drilling
US5092718A (en) * 1990-12-10 1992-03-03 Metal Cutting Tools Corp. Drill with replaceable cutting inserts
DE4117486A1 (de) * 1991-05-28 1992-12-03 Hitachi Seiko Kk Verbesserter bohrer und schrittvorschubverfahren
US5174691A (en) * 1989-09-05 1992-12-29 Ford Motor Company High feed rate deep penetration drill
US5304020A (en) * 1992-02-14 1994-04-19 Dornier Luftfahrt Gmbh Cutting tool for making cylindrical bores

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545586A1 (de) * 1985-12-21 1987-07-02 Komet Stahlhalter Werkzeug Bohrwerkzeug
DE9312802U1 (de) * 1993-08-26 1993-11-25 Werthwein, Gustav, 71665 Vaihingen Bohrwerkzeug
DE4416040A1 (de) * 1994-05-03 1995-11-09 Johne & Co Praezisionswerkzeug Bohrwerkzeug

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1477244A1 (de) * 1964-10-20 1969-09-04 Dearborn Howard Kenneth Bohrwerkzeug
SU521074A1 (ru) * 1974-07-17 1976-07-15 Предприятие П/Я В-8772 Спиральное сверло
US3963365A (en) * 1975-05-07 1976-06-15 Metal Cutting Tools, Inc. Drill with indexable inserts
US4373839A (en) * 1979-10-02 1983-02-15 Mitsubishi Kinzoku Kabushiki Kaisha Drill bit
US4813823A (en) * 1986-01-18 1989-03-21 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Drilling tool formed of a core-and-casing assembly
US5035552A (en) * 1988-09-29 1991-07-30 Lysenko Viktor G Twist drill for deep hole drilling
US5174691A (en) * 1989-09-05 1992-12-29 Ford Motor Company High feed rate deep penetration drill
US5092718A (en) * 1990-12-10 1992-03-03 Metal Cutting Tools Corp. Drill with replaceable cutting inserts
DE4117486A1 (de) * 1991-05-28 1992-12-03 Hitachi Seiko Kk Verbesserter bohrer und schrittvorschubverfahren
US5304020A (en) * 1992-02-14 1994-04-19 Dornier Luftfahrt Gmbh Cutting tool for making cylindrical bores

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001017719A1 (fr) * 1998-05-19 2001-03-15 Ingersoll Cutting Tool Company Foret rigide
US6000887A (en) * 1998-05-19 1999-12-14 Ingersoll Cutting Tool Company Stiff drill
US6238151B1 (en) * 1998-09-28 2001-05-29 Mitsubishi Materials Corporation Drilling tool and throw-away tip for use in drilling work
US20030012613A1 (en) * 2001-07-05 2003-01-16 Syoji Takiguchi Throw-away tip for use in drilling work and throw-away drilling tool
US6874979B2 (en) * 2001-07-05 2005-04-05 Mitsubishi Materials Corporation Throw-away tip for use in drilling work and throw-away drilling tool
US6808340B2 (en) 2002-09-06 2004-10-26 Prototype Productions, Inc. Tool apparatus
US7575400B2 (en) * 2002-09-09 2009-08-18 Komet Group Holding Gmbh Drilling tool with alternating cutting plates and alternating cutting plates for said drilling tool
US20060110227A1 (en) * 2002-09-09 2006-05-25 Jacek Kruszynski Drilling tool with alternating cutting plates and alternating cutting plates for said drilling tool
US20050163921A1 (en) * 2004-01-23 2005-07-28 The Boeing Company Method of repairing a workpiece
US20080232915A1 (en) * 2004-12-02 2008-09-25 Werner Reinhardt Twist drill for drilling with a countersink cutting arrangement, and a cutting tool with a countersink cutting arrangement, and a cutting-chamfering tool
US8142115B2 (en) * 2004-12-02 2012-03-27 Kennametal Inc. Twist drill for drilling with a countersink cutting arrangement, and a cutting tool with a countersink cutting arrangement, and a cutting-chamfering tool
US20090116913A1 (en) * 2007-11-01 2009-05-07 Gm Global Technology Operations Inc. Polycrystalline Diamond Cutting Tool with Coated Body
US9079260B2 (en) * 2007-11-01 2015-07-14 GM Global Technology Operations LLC Polycrystalline diamond cutting tool with coated body
US20110033255A1 (en) * 2008-03-25 2011-02-10 Unitac, Inc. Gun Drill
US9579732B2 (en) 2012-07-18 2017-02-28 Milwaukee Electric Tool Corporation Hole saw
US11084107B2 (en) 2012-07-18 2021-08-10 Milwaukee Electric Tool Corporation Hole saw
US11745273B2 (en) 2012-07-18 2023-09-05 Milwaukee Electric Tool Corporation Hole saw
US11084108B2 (en) 2012-07-18 2021-08-10 Milwaukee Electric Tool Corporation Hole saw
US10751811B2 (en) 2012-07-18 2020-08-25 Milwaukee Electric Tool Corporation Hole saw
US10086445B2 (en) 2012-07-18 2018-10-02 Milwaukee Electric Tool Corporation Hole saw
USRE48513E1 (en) 2012-07-18 2021-04-13 Milwaukee Electric Tool Corporation Hole saw
US10493536B2 (en) * 2015-11-26 2019-12-03 Sumitomo Electric Hardmetal Corp. Rotary tool
US20180318939A1 (en) * 2015-11-26 2018-11-08 Sumitomo Electric Hardmetal Corp. Rotary tool
CN112262009A (zh) * 2018-06-13 2021-01-22 博泰克精密钻孔技术有限公司 切削表面中具有一个或多个凹陷的深孔钻和钻具
EP3807036B1 (fr) * 2018-06-13 2023-11-01 botek Präzisionsbohrtechnik GmbH Foret long et outil de fond comportant une ou plusieurs cavités dans la face de coupe
US11148212B2 (en) 2018-07-10 2021-10-19 Milwaukee Electric Tool Corporation Hole saw with hex sidewall holes
US11845134B2 (en) 2018-07-10 2023-12-19 Milwaukee Electric Tool Corporation Hole saw with hex sidewall holes
USD958855S1 (en) 2019-12-09 2022-07-26 Milwaukee Electric Tool Corporation Hole saw

Also Published As

Publication number Publication date
EP0841115A1 (fr) 1998-05-13
CA2213544C (fr) 2000-11-07
IL121935A (en) 2001-01-11
IL121935A0 (en) 1998-03-10
CA2213544A1 (fr) 1998-05-06
CN1184012A (zh) 1998-06-10
JPH10296514A (ja) 1998-11-10
KR19980042014A (ko) 1998-08-17
CN1069248C (zh) 2001-08-08
KR100243848B1 (ko) 2000-03-02

Similar Documents

Publication Publication Date Title
US5816754A (en) Elongated drill with replaceable cutting inserts
EP0490122B1 (fr) Foret à plaquettes de coupe remplaçables
KR100371244B1 (ko) 리셋인서트들을갖는드릴링공구
JP2635420B2 (ja) 回転穿孔具
US4189266A (en) Rotary drill bit for hand-held power drills
US20080152438A1 (en) Ballnose end mill
EP2265402B1 (fr) Outil de découpe à arête centrale
US6685402B2 (en) Drill insert geometry having V-notched web
US4470733A (en) Multiple function cutting tool
US4768901A (en) Drill having two or more cutting edges comprising exchangeable cutting members
EP3778083A1 (fr) Insert de perçage indexable
US6848869B2 (en) Spot and chamfer drill insert
JPH02303704A (ja) 高速高送り用バニシングドリルリーマ
JP2004502553A (ja) 割り出し可能ドリルおよびその切削用インサート
JP7400311B2 (ja) ドリル
JP7423965B2 (ja) ドリル
JP2649015B2 (ja) ドリル
JPH0632253Y2 (ja) バニシングドリル
JPH09295212A (ja) スローアウェイ式ドリルおよびスローアウェイチップ
JP7434791B2 (ja) ドリル
US20240189924A1 (en) Cutting Body and Drilling Tool Having a Cutting Body
JPH09290311A (ja) スローアウェイ式穴明け工具
JPH0890323A (ja) ドリル
JP5589401B2 (ja) 刃先交換式溝入れ工具及び端面溝入れ加工方法
CA1207566A (fr) Foret et sa mise indexable en carbure

Legal Events

Date Code Title Description
AS Assignment

Owner name: GREENFIELD INDUSTRIES, GEORGIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHALLENBERGER, FRED T.;REEL/FRAME:008647/0286

Effective date: 19961104

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12